221052100345 has 8 divisors (see below), whose sum is σ = 265467048264. Its totient is φ = 176705328384.

The previous prime is 221052100337. The next prime is 221052100361. The reversal of 221052100345 is 543001250122.

It can be written as a sum of positive squares in 4 ways, for example, as 30665613456 + 190386486889 = 175116^2 + 436333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221052100345 - 2³ = 221052100337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17036854 + ... + 17049823.

It is an arithmetic number, because the mean of its divisors is an integer number (33183381033).

Almost surely, 2^221052100345 is an apocalyptic number.

It is an amenable number.

221052100345 is a deficient number, since it is larger than the sum of its proper divisors (44414947919).

221052100345 is a wasteful number, since it uses less digits than its factorization.

221052100345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34087979.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 221052100345 its reverse (543001250122), we get a palindrome (764053350467).

The spelling of 221052100345 in words is "two hundred twenty-one billion, fifty-two million, one hundred thousand, three hundred forty-five".